/Engine/Source/Developer/AssetTools/Public/AssetViewUtils.h
Clears custom thumbnails for the selected assets
namespace AssetViewUtils { void AssetViewUtils::ClearCustomThumbnails ( const [TArray](API\Runtime\Core\Containers\TArray)< [FAssetData](API\Runtime\CoreUObject\AssetRegistry\FAssetData) > & InAssetsToAssign ) }